The message attached with the new year's photo was just as sweet as the image itself: "I hope your 2016 is happy, healthy and productive. As the world faces new challenges and opportunities, may we all find the courage to keep making progress and making all our days count."

Zuckerberg is certainly looking to make things count. Shortly after the birth of his first child, the Facebook founder announced that he would be donating $45 billion towards the Chan Zuckerberg Initiative, which he says will focus on "personalized learning, curing disease, connecting people and building strong communities."